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Cloud Computing (CC) - Arquitectura de Sistemas Computacionais

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3. Emergência <strong>de</strong> <strong>Cloud</strong>s...<br />

anos 1980 / 90 -- a) Clusters<br />

nas empresas para servidores<br />

e equilíbrio dinâmico <strong>de</strong> carga<br />

conceito <strong>de</strong> localida<strong>de</strong> dos dados<br />

meados 90 -- b) Grids<br />

expansão do conceito <strong>de</strong> cluster<br />

grd obstáculo: a falta <strong>de</strong> localida<strong>de</strong> dos dados<br />

+ gestão/acesso a arquivos remotos <strong>de</strong> gran<strong>de</strong> capacida<strong>de</strong><br />

+ transferência <strong>de</strong> dados eficiente e fiável<br />

+ segurança Globus toolkit<br />

+ normalização com Web services<br />

SCG<br />

41

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